Rule 849 — Before Issuing TOP Authority

1. (a)ensure there is no conflicting movement within, or authorized to enter, the TOP limits to be granted unless such movement has been restricted in accordance with Rule 311, 567.1, 567.2, 618 or 618.1; and
2. (b)in CTC and controlled interlockings, block at Stop all devices controlling signals governing the entry of movements into the limits to be granted. Signal blocking applied to protect a TOP must be maintained until the TOP is cancelled to the foreman.

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